Hey, that appears to have fixed my issue, thanks for the assistance! 

Hello,

Thank you for getting back to me.

Everything seems fine with your configuration.

What I can suggest is try referencing Ignite UI scripts locally. Create a folder in your application and add your scripts there. Change the references to point to this folder instead of pointing to Infragistics CDN. For example:

   <!-- Ignite UI Required Combined CSS Files -->
    <link href="~/Scripts/css/themes/infragistics/infragistics.theme.css" rel="stylesheet" />
    <link href="~/Scripts/css/structure/infragistics.css" rel="stylesheet" />
    <script src="http://ajax.aspnetcdn.com/ajax/modernizr/modernizr-2.8.3.js"></script>
    <script src="http://code.jquery.com/jquery-1.11.3.min.js"></script>
    <script src="http://code.jquery.com/ui/1.11.1/jquery-ui.min.js"></script>
    <!-- Ignite UI Required Combined JavaScript Files -->
    <script src="~/Scripts/js/infragistics.core.js"></script>
    <script src="~/Scripts/js/infragistics.lob.js"></script>

I am attaching the folder containing the scripts for your reference. Please add it in your application and reference the script files from there.

Please let me know how it behaves on your side.

My code is as follow, unsure if anything could be causing this?

@(Html.Infragistics()
.Grid(Model.TimeLines)
.ID("Grid")
.Height("500px")
.Width("100%")
.AutoGenerateColumns(false)
.AutoGenerateLayouts(false)
.RenderCheckboxes(true)
.PrimaryKey("ID")
.Columns(column =>
{
column.For(x => x.ID).HeaderText("ID").Width("*").DataType("string").Hidden(true);
column.For(x => x.Invoiced).HeaderText("Invoiced").Width("*").DataType("bool").Hidden(true);
column.For(x => x.UnitNumber).HeaderText("Unit Number").Width("*").DataType("string");
column.For(x => x.EquipmentType).HeaderText("Equipment Type").Width("*").DataType("string");
column.For(x => x.SubType).HeaderText("Sub Type").Width("*").DataType("string");
column.For(x => x.CurrentInstallation).HeaderText("Current Installation").Width("*").DataType("string");
column.For(x => x.StartDate).HeaderText("Start Date").Width("*").DataType("date").Format("dd/MM/yyyy");
column.For(x => x.EndDate).HeaderText("End Date").Width("*").DataType("date").Format("dd/MM/yyyy");
column.For(x => x.DayRate).HeaderText("Day Rate").Width("*").DataType("number");
column.For(x => x.ExternalClient).HeaderText("External client").Width("*").DataType("string");
column.For(x => x.WebConfirmed).HeaderText("Web Confirmed").Width("*").DataType("bool");

})
.Features(feature =>
{
feature.Updating().EnableAddRow(false).EnableDeleteRow(false).ColumnSettings(cs =>
{
cs.ColumnSetting().ColumnKey("ID").EditorType(ColumnEditorType.Numeric).ReadOnly(true);
cs.ColumnSetting().ColumnKey("EquipmentType").EditorType(ColumnEditorType.Text).ReadOnly(true);
cs.ColumnSetting().ColumnKey("UnitNumber").EditorType(ColumnEditorType.Text).ReadOnly(true);
cs.ColumnSetting().ColumnKey("SubType").EditorType(ColumnEditorType.Text).ReadOnly(true);
cs.ColumnSetting().ColumnKey("CurrentInstallation").EditorType(ColumnEditorType.Text).ReadOnly(true);
cs.ColumnSetting().ColumnKey("StartDate").EditorType(ColumnEditorType.DatePicker).ReadOnly(false);
cs.ColumnSetting().ColumnKey("EndDate").EditorType(ColumnEditorType.DatePicker).ReadOnly(false);
cs.ColumnSetting().ColumnKey("DayRate").EditorType(ColumnEditorType.Numeric).ReadOnly(false);
cs.ColumnSetting().ColumnKey("ExternalClient").EditorType(ColumnEditorType.Text).ReadOnly(false);
cs.ColumnSetting().ColumnKey("WebConfirmed").EditorType(ColumnEditorType.Checkbox).ReadOnly(false);
});
feature.Sorting();
feature.Filtering();
feature.Hiding();
feature.Paging();
//feature.Responsive();

})
//.DataSourceUrl(Url.Action("GetTimelines"))
.DataSource(Model.TimeLines)
.EnableUTCDates(false)
.UpdateUrl(Url.Action("SaveTimelines"))
.DataBind()
.Render()
)

Hey, thank you for the reply

I have tested your project on chrome/firefox, on firefox it appears to work as intended (as does my own project) however in chrome the strange error appears in both my own project and in your example project.

Does this happen on your machine as well in chrome or perhaps is there an issue with my installation of chrome?